Update the nine patch layer to use UI resources

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index fff226a67b78706bab01a0cf8562a6a7768d458d..e2e33d2636b3062fa1802172807a3d9189672427 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -87,18 +87,35 @@ struct CC_EXPORT RendererCapabilities {
   bool using_discard_framebuffer;
 };
 
-struct CC_EXPORT UIResourceRequest {
+class CC_EXPORT UIResourceRequest {
+ public:
   enum UIResourceRequestType {
     UIResourceCreate,
     UIResourceDelete,
     UIResourceInvalidRequest
   };
 
-  UIResourceRequest();
+  UIResourceRequest(UIResourceRequestType type, UIResourceId id);
+  UIResourceRequest(UIResourceRequestType type,
+                    UIResourceId id,
+                    const UIResourceBitmap& bitmap);
+  UIResourceRequest(const UIResourceRequest& request);
+
   ~UIResourceRequest();
-  UIResourceRequestType type;
-  UIResourceId id;
-  scoped_refptr<UIResourceBitmap> bitmap;
+
+  UIResourceRequestType GetType() const { return type_; }
+  UIResourceId GetId() const { return id_; }
+  UIResourceBitmap GetBitmap() const {
+    DCHECK(bitmap_);
+    return *bitmap_.get();
+  }
+
+  UIResourceRequest& operator=(const UIResourceRequest& request);
+
+ private:
+  UIResourceRequestType type_;
+  UIResourceId id_;
+  scoped_ptr<UIResourceBitmap> bitmap_;
 };
 
 class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
@@ -295,6 +312,8 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
   // were evicted on the impl thread.
   void RecreateUIResources();
 
+  virtual gfx::Size GetUIResourceSize(UIResourceId id) const;
+
   bool UsingSharedMemoryResources();
   int id() const { return tree_id_; }
 
@@ -331,7 +350,13 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
 
   bool AnimateLayersRecursive(Layer* current, base::TimeTicks time);
 
-  typedef base::hash_map<UIResourceId, UIResourceClient*> UIResourceClientMap;
+  struct UIResourceClientData {
+    UIResourceClient* client;
+    gfx::Size size;
+  };
+
+  typedef base::hash_map<UIResourceId, UIResourceClientData>
+      UIResourceClientMap;
   UIResourceClientMap ui_resource_client_map_;
   int next_ui_resource_id_;